Portion of a golf club head for a putter



FIG. 1 is a perspective view of a portion of a golf club head for a putter showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a toe side view thereof;

FIG. 4 is a heel side view thereof; and,

FIG. 5 is a rear view thereof.

The broken line showing immediately adjacent the shaded portion forms an unclaimed boundary of the design. The broken line showing of various features and the remainder of the golf club head for a putter form no part of the claimed design. 

The ornamental design for a portion of a golf club head for a putter, as shown and described. 